The Jammin JP-4 tuned pipe is designed specifically for 1/8 off-road racing and its designed to improve mid-range to top-end speed without sacrificing bottom-end punch. Like the rest of the JP pipes, the JP-4 features a smash-proof billet stinger and reliable spring coupler design. The JP-4 is IFMAR legal, which means that you can race it at sanctioned events, and it available in two different coatings; hard-anodized or nickel plated chrome. According to OFNA, the nickel plated finish is practically impervious to stains. Both versions include 2 coupler grommets, springs, setscrew and a spring-loaded pipe hanger.